Could you please describe your application: N:;z~` 1, is the emitting source single mode or multimode? what are the parameters i.e. divergence, waist, ... GI@;76Qf 2, is the fiber single mode or multimode? what is the NA, core dia,... ]FgKL0 ;iW>i8 Generally, fiber coupling efficiency of 40%~90% is reasonable. 1Tr%lO5?6 Xck`"RU<xA Again let us know your specific bug. 51tZ:-1! NFF!g]QN MANG2004 axOEL:-|Bu